CHM 111 Exam 1|94 Questions with Verified Answers,100% CORRECT
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Course
CHM 111
Institution
CHM 111
CHM 111 Exam 1|94 Questions with Verified Answers
Molecular formula: Water - CORRECT ANSWER H20
Structural formula: Water - CORRECT ANSWER H-O-H
Ball-and-stick model: Water - CORRECT ANSWER Oxygen in the center with two Hydrogens on the sides connected by sticks
Space-filling model: W...
Ball-and-stick model: Water - CORRECT ANSWER Oxygen in the center with two
Hydrogens on the sides connected by sticks
Space-filling model: Water - CORRECT ANSWER Oxygen in the center with two
Hydrogens hugging it
Cluster of water
molecules - CORRECT ANSWER A bunch of H2O space-filling models in a cluster
Matter on the Atomic Scale - CORRECT ANSWER The properties of matter depend
on
the types and arrangement of atoms
and molecules
Macroscopic - CORRECT ANSWER visible to the naked eye
Microscopic - CORRECT ANSWER too small to be seen except under a microscope
Classification of Matter - CORRECT ANSWER pure substances and mixtures
Classification of Matter: Substances - CORRECT ANSWER -elements
-compounds
Elements - CORRECT ANSWER -The most basic units of matter
-Elements are substances composed of only one type of atoms
-Cannot be broken down into smaller units by chemical means
-Simple definition: Things found on the periodic table
, total elements on periodic table - CORRECT ANSWER 118 (90 naturally occurring)
Which of the following is/are elements?
A. Sodium (Na)
B. Sugar (C6H12O6)
C. Nitrogen (N2)
D. Sand (SiO2)
E. Copper oxide (CuO) - CORRECT ANSWER A and C
Atoms - CORRECT ANSWER Smallest chemical unit of matter or indivisible unit of
an
element
Molecule - CORRECT ANSWER A molecule is formed when two or more atoms join
together chemically
Compounds - CORRECT ANSWER -Combination of at least two or more atoms of
different elements
bonded together in a defined ratio
-Can be broken down into smaller units by chemical means
Compounds and molecules - CORRECT ANSWER All compounds are molecules but
not all molecules are compounds
Which of the following is/are compounds?
A. Sodium (Na)
B. Sugar (C6H12O6)
C. Nitrogen (N2)
D. Sand (SiO2)
E. Copper oxide (CuO) - CORRECT ANSWER B, D, E
In general, macroscopic properties of these states are directly related to the
arrangement and properties of particles at the atomic level
-Physical State
-Packing
-Interaction between molecules
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